drm/amdgpu: Remove else after return in 'is_fru_eeprom_supported'

Expressions under 'else' branch under case 'CHIP_SIENNA_CICHLID' in
function 'is_fru_eeprom_supported' are executed whenever the expression
in 'if' is False. Otherwise, return from case occurs. Therefore, there
is no need in 'else', and it has been removed.

Fixes the following:

WARNING: else is not generally useful after a break or return
+                               return false;
+                       } else {

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_fru_eeprom.c

@@ -83,11 +83,12 @@ static bool is_fru_eeprom_supported(struct amdgpu_device *adev, u32 *fru_addr)
 			if (strnstr(atom_ctx->vbios_pn, "D603GLXE",
 				    sizeof(atom_ctx->vbios_pn))) {
 				return false;
-			} else {
-				if (fru_addr)
-					*fru_addr = FRU_EEPROM_MADDR_6;
-				return true;
 			}
+
+			if (fru_addr)
+				*fru_addr = FRU_EEPROM_MADDR_6;
+			return true;
+
 		} else {
 			return false;
 		}